CN103048920B - Hot standby service redundant control method and system for container water chilling unit - Google Patents
Hot standby service redundant control method and system for container water chilling unit Download PDFInfo
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Abstract
The invention discloses a hot standby service redundant control method and system for a container water chilling unit. The system comprises a main controller and a standby main controller for uniformly coordinating and controlling control systems corresponding to four air-cooled chiller units, wherein the main controller and the standby controller also respectively have control functions on a first air-cooled chiller unit and a second air-cooled chiller unit; a third controller and a fourth controller in the four sets of the control systems respectively have control functions of a third air-cooled chiller unit and a fourth air-cooled chiller units; and when the main controller is offline, or a water inlet or water outlet temperature sensor connected with the main controller is failed, the standby main controller replaces the main controller to control. Due to the adoption of the invention, the undisturbed switching between the main controller and the standby main controller can be realized, the stable operation of the whole system is ensured, and the high reliability of the whole network system is also ensured, so that the defect of high cost of the prior art is overcome.
Description
Technical field
The present invention relates to industrial control field, in particular a kind of two-node cluster hot backup redundancy control method for container handpiece Water Chilling Units and system, realize the network no-harass switch control method in high reliability place for two console controller need be used.
Background technology
Current is two-node cluster hot backup redundancy for the common method realizing high reliability in network communication, current market require quite high to the controller realizing two-node cluster hot backup redundancy, with regard to industrial control field, be only equal to Siemens S7300 series and above PLC can realize two-node cluster hot backup redundancy feature.Because the requirement of this two-node cluster hot backup redundant system to controller is high, and the opertaing device in whole network also needs to match with hot backup redundancy control system, can realize the redundancy of real whole network system.This improves the class requirement of network central control control equipment virtually, therefore, causes whole Control System NetWork cost quite high.In addition, because this kind of two-node cluster hot backup redundant system generally adopts the controller of 2 relatively independent redundancies each other to realize two-node cluster hot backup redundancy feature specially, the controlling functions of equipment in network need be gone by other independent control to realize, cause in the redundant network be such as made up of 4 equipment, the situation of needs 6 master controllers may be there is, cause whole net control cost higher.
Therefore, prior art has yet to be improved and developed.
Summary of the invention
The object of the present invention is to provide a kind of two-node cluster hot backup redundancy control method for container handpiece Water Chilling Units and
andsystem, is intended to solve prior art higher problem causing cost high of requirement to controller and the whole network equipment when realizing two-node cluster hot backup redundancy.
Technical scheme of the present invention is as follows:
For a two-node cluster hot backup redundancy control method for container handpiece Water Chilling Units, wherein, comprise the following steps:
Step S1: master controller and master controller for subsequent use calculate according to the value of water inlet manifold corresponding to its current master controller and outfall sewer temperature sensor the water pump number of units and compressor number of units that need open respectively;
Step S2: oneself is participated in important parameter that is on duty by turns and that switch and sends to the other side in real time by master controller and master controller for subsequent use;
Step S3: the three controller and the 4th controller send the important parameter of oneself to master controller and master controller for subsequent use;
Step S4: judge whether master controller and master controller for subsequent use have off-line or respective sensor whether to have fault, if without continuation step S1; If have, perform step S5;
Step S5: if master controller off-line or sensor fault, current master controller is switched to master controller for subsequent use, before switching completes, the demand continuing to send by master controller before switching is to control online unit, and the demand sent according to master controller for subsequent use after having switched is to control online unit.
The described two-node cluster hot backup redundancy control method for container handpiece Water Chilling Units, wherein, master controller and master controller for subsequent use are specified by control system, and both can exchange.
The described two-node cluster hot backup redundancy control method for container handpiece Water Chilling Units, wherein, if rehabilitation control system after master controller reparation, the information of other online units all transmits once to the master controller of this recurrence by the master controller for subsequent use then now serving as master control, the information of oneself is still sent to the master controller of this recurrence by other controllers by normal pattern, ownership is not changed to the master controller returned by the master controller for subsequent use now serving as master control, this main control for subsequent use of now serving as master control continues the task and the role that serve as current master controller, the master controller returned then serves as and serves as task and the role of master controller for subsequent use, until when now serving as primary controller off-line for subsequent use or the sensor fault of master control, ownership is just changed to the main control returned by the master controller for subsequent use now serving as master control, efficiently avoid sovereignty unnecessary between master controller and master controller for subsequent use to exchange, improve the reliability of whole network system.
The described two-node cluster hot backup redundancy control method for container handpiece Water Chilling Units, wherein, if master controller off-line for subsequent use or fault, then master controller, the 3rd controller and the 4th controller do not continue to send data message to master controller for subsequent use.
The described two-node cluster hot backup redundancy control method for container handpiece Water Chilling Units, wherein, if rehabilitation control system after master controller reparation for subsequent use, the information of other online units all transmits once to the master controller for subsequent use of this recurrence by master controller, the master controller for subsequent use of this recurrence still keeps the identity of master controller for subsequent use to run in a network, and the information of oneself is still sent to the master controller for subsequent use of this recurrence by other controllers by normal pattern.
A kind of two-node cluster hot backup redundancy control system for container handpiece Water Chilling Units, wherein, comprise four cooling by wind, four cover control system and annular communication networks, four cover control system comprise for unifying the master controller of cooperation control and master controller for subsequent use to the control system corresponding to four cooling by wind, and described master controller and master controller for subsequent use also need the controlling functions of holding a concurrent post the first cooling by wind and the second cooling by wind respectively; In four cover control system, the 3rd controller and the 4th controller serve as the 3rd cooling by wind and the 4th cooling by wind controlling functions respectively, described master controller, master controller for subsequent use, the 3rd controller and the 4th controller connect into loop network on network, the water inlet connected when master controller off-line or master controller or leaving water temperature sensors fault, then by the control of master controller adapter master controller for subsequent use.
The described two-node cluster hot backup redundancy control system for container handpiece Water Chilling Units, wherein, described master controller and master controller for subsequent use can exchange.
The described two-node cluster hot backup redundancy control system for container handpiece Water Chilling Units, wherein, described master controller and master controller for subsequent use are provided with inflow temperature sensor and leaving water temperature sensors respectively; On house steward's water inlet pipe that the water inlet of master controller and master controller for subsequent use and leaving water temperature sensors are installed in four cooling by wind and house steward's rising pipe.
The described two-node cluster hot backup redundancy control system for container handpiece Water Chilling Units, wherein, described master controller and master controller for subsequent use carry out real-time data synchronization under normal operating conditions.
Beneficial effect of the present invention: the present invention is by providing a kind of two-node cluster hot backup redundancy control system for container handpiece Water Chilling Units, be provided with master controller and master controller for subsequent use, by control method realizing master controller and master controller for subsequent use real-time data synchronization under normal circumstances, when master controller or master controller off-line for subsequent use or sensor fault, master controller and the no-harass switch of master controller for subsequent use when carrying out sovereignty handing-over is realized by certain control strategy, successfully ensure that the stable operation of whole system, while effectively reducing this hot backup redundancy system cost, high reliability and the no-harass switch of whole network system can also be ensured, to overcome high cost weak point of the prior art.
Accompanying drawing explanation
The Control System NetWork schematic diagram that Fig. 1 provides for the embodiment of the present invention.
Fig. 2 is the control system control strategy that provides of inventive embodiments and method flow diagram.
in figure: 1 is master controller, 2 master controllers for subsequent use, 3 is the 3rd controller, 4 is the 4th controller, 5 is the first cooling by wind, 6 is the second cooling by wind, 7 is the 3rd cooling by wind, 8 is the 4th cooling by wind, 9 is the water pump that the first cooling by wind is corresponding, 10 is the water pump that the second cooling by wind is corresponding, 11 is the water pump that the 3rd cooling by wind is corresponding, 12 is the water pump that the 4th cooling by wind is corresponding, 13 is house steward's inflow temperature sensor that master controller is corresponding, 14 is the water inlet manifold temperature sensor that master controller for subsequent use is corresponding, 15 is the outfall sewer temperature sensor that master controller is corresponding, 16 is the outfall sewer temperature sensor that master controller for subsequent use is corresponding, solid arrow represents network communication line, the each sensor connect lines of represented by dotted arrows and control line.
Embodiment
For making object of the present invention, technical scheme and advantage clearly, clearly, developing simultaneously referring to accompanying drawing, the present invention is described in more detail for embodiment.
See Fig. 1, the object of the invention is to a kind of two-node cluster hot backup redundancy control system for container handpiece Water Chilling Units designed, it comprises four cooling by wind, four cover control system and annular communication networks.Wherein, in four cover control system, be fixed with two covers and be set to master controller and master controller for subsequent use, described master controller 1 and master controller for subsequent use 2 also need the controlling functions of holding a concurrent post the first cooling by wind 5 and the second cooling by wind 6; The controlling functions of the 3rd cooling by wind 7 and the 4th cooling by wind 8 served as respectively by 3rd controller 3 and the 4th controller 4.Described master controller 1, master controller for subsequent use 2, the 3rd controller 3 and the 4th controller 4 connect into loop network on network.
Described master controller 1 and master controller for subsequent use 2 are provided with inflow temperature sensor and leaving water temperature sensors respectively; On house steward's water inlet pipe that the water inlet of master controller and master controller for subsequent use and leaving water temperature sensors are installed in four cooling by wind and house steward's rising pipe.
3rd controller 3 of described 3rd cooling by wind 7 and the 4th cooling by wind 8 correspondence and the 4th controller 4 all do not arrange water inlet and leaving water temperature sensors.
Under normal circumstances, as the master controller of whole control system, cooperation control is unified to the control system corresponding to four cooling by wind.The water inlet connected when master controller off-line (referring to leave network) or master controller or leaving water temperature sensors fault, then by the control of master controller adapter master controller for subsequent use, cooperation control is unified to the control system corresponding to four cooling by wind.(master controller and master controller for subsequent use interchangeable, do not limit which platform always as master controller),
The present invention is owing to being provided with master controller and master controller for subsequent use, by control method realizing master controller and master controller for subsequent use real-time data synchronization under normal circumstances, when master controller or master controller off-line for subsequent use or sensor fault, master controller and the no-harass switch of master controller for subsequent use when carrying out sovereignty handing-over is realized by certain control strategy, successfully ensure that the stable operation of whole system, namely when master controller and master controller for subsequent use carry out sovereignty handing-over, the even running of whole system is achieved by control method, maintain the unit being originally in open state and still keep open state, open the unit needing to open according to the demand of load simultaneously, guarantee the cold of whole air-conditioning system.Avoid the part of generating units that may cause when master controller and master controller for subsequent use switch first out of service and then situation about reopening as required.
The no-harass switch of the master controller in the present invention and master controller for subsequent use is realized, without the need to increasing extra hardware device by control device and control strategy purely.
Master controller in the present invention and master controller for subsequent use, except serving as the role of master controller function, also need to serve as the controlling functions controlling the first cooling by wind and the second cooling by wind respectively.
See Fig. 2, the present invention achieves the real-time synchronization of data between master controller and master controller for subsequent use by following control strategy and method, achieve master controller and master controller for subsequent use sovereignty handing-over time no-harass switch and smooth transition.
When main frame or sensor normal time Strategy For Synchronization Control be:
First, master controller and master controller for subsequent use calculate according to the value of water inlet manifold corresponding to its current master controller or outfall sewer temperature sensor the water pump number of units and compressor number of units that need open, because unified water inlet manifold corresponding to current master controller or the outfall sewer temperature sensor of employing is to carry out demand calculating, namely accomplish unification in calculating water pump demand and compressor demand, because water temperature is in real-time change, the demand of water pump and compressor that this means is also in real-time change, and master controller and master controller for subsequent use all carry out by water inlet manifold corresponding to current master controller or outfall sewer temperature sensor the benefit that water pump demand and compressor demand calculate and be: (1) ensure that master controller and master controller for subsequent use have accomplished real-time unification when calculating water pump demand and compressor demand, (2) drawback that master controller for subsequent use calculates not according to this principle is avoided, because water temperature real-time change can cause the demand real-time change of water pump and compressor, if master controller for subsequent use calculates not according to mentioned above principle, in order to reach master controller and the real-time synchronization of master controller for subsequent use on water pump and compressor demand, can only lean on current master controller that its water pump oneself calculated and compressor demand information are sent to master controller for subsequent use in the mode of communication, due to demand real-time change, so the transmission of demand also carry out in real time, the speed of the whole network of such meeting remote effect, the problem of demand real-time synchronization had then both been solved by above-mentioned method, also ensure that the speed of whole network, achieve the good result of killing two birds with one stone.
Then, the important parameter of oneself can be sent to the other side and the 3rd by master controller and master controller for subsequent use in real time, No. four controller, 3rd controller and the 4th controller also can send the important parameter of oneself to master controller and master controller for subsequent use simultaneously, so just make the real-time significant data all having concentrated four units in main controller and master controller for subsequent use, these significant datas mainly comprise the water pump and compressor demand parameter that each unit need open, the actual motion state of each unit water pump and compressor, the various fault status informations of each unit.These data messages are used to guarantee master controller and master controller real-time synchronization for subsequent use and are used for judge whether master controller and master controller for subsequent use need to switch, and whether four units meet the important evidence of the conditions such as fault on duty by turns and time is on duty by turns.Under normal circumstances, the completely the same and real-time synchronization of these data in master controller and master controller for subsequent use is achieved.
Data syn-chronization control strategy when main frame off-line or sensor fault is:
First be the synchronous process carrying out sensor, when the water inlet corresponding to master controller or leaving water temperature sensors fault, master controller can surrender sovereignty to master controller for subsequent use, because exchanges data needs the regular hour to go, in order to avoid in this time dead also not taking over sovereignty at master controller for subsequent use completely, because sensor fault causes the water inlet in whole network or the abnormal situation of complete machine shutdown or fault that causes of leaving water temperature to occur, in control, pass through routine processes, in the time of two main frame handing-over neutral gears, take the water inlet before still continuing to use master controller water inlet or leaving water temperature sensors fault or leaving water temperature to control the operation of whole equipment in network, until after backup host presses pipe sovereignty completely, the water inlet of control system again corresponding to backup host or leaving water temperature carry out the individual device in net control, achieve synchronous process during sensor fault,
Next is the synchronous process of opening sequence, because synchronisation measures time normal ensure that the data of master controller and master controller for subsequent use are completely the same, so, when current hosts off-line or sensor fault cannot realize host function, the information of the main frame of the information of other unit in backup host and firm off-line is completely the same, now after current hosts off-line, control system is passed through: only think the control strategy that the off-line fault of off-line main frame processes as a unit fault, ensure that the original unit run continues to run, the unit originally do not run decides to open or close depending on workload demand according to unit fault principle, when backup host adapter sovereignty work after ensure that main frame off-line, ensure that the running status of original unit is constant, achieve the smooth transition of main frame and backup host switching.
Then be the neutral gear issue handling of current master controller when being switched to master controller for subsequent use: when current master controller is switched to master controller for subsequent use, there will be the situation of short time whole control system without master controller, namely master controller off-line cannot travel host function, master controller for subsequent use also not adapter sovereignty completely, neutral gear when sovereignty are exchanged occurs, if do not processed, there will be all units and all stop and then occurring by the situation that certain requirement is opened; Inner by the program at the online unit of every platform on control strategy, take following measures to realize the smooth transition of master controller and master controller for subsequent use switching space-time working days; Be specially, inner in the online unit program of every platform, by such as: the demand sent by master controller controls online unit, when there is neutral gear problem, online unit keeps the desired signal of original main frame by routine processes, until time dead terminates, then control by the desired signal of new main frame; So just, achieve all online unit situation of opening again out of service that in main frame and backup host handoff procedure, neutral gear problem may cause, achieve smooth transition during master-slave swap;
Finally the synchronous process returning network after master controller or the long-time off-line of master controller for subsequent use: after master controller or the long-time off-line of master controller for subsequent use, the data of existing master controller and off-line master controller inside are caused to be distinguished very large, after returning network again to make off-line master controller, obtain up-to-date data message, in control by incumbent master controller after detecting that the signal of network got back to by off-line master controller, the master controller that the information of other online units all returns network again to off-line is transmitted once, realize the synchronizing information of master controller and master controller for subsequent use, after from machine controller, other detects that the signal of network got back to by off-line main frame, while still the information of oneself being sent to incumbent main frame by former normal pattern, after also sending to off-line, return the master controller for subsequent use of network, thus realize the Complete Synchronization of two host informations, the master controller for subsequent use of off-line still keeps the identity of master controller for subsequent use to run in a network after returning network, until when off-line fault or sensor fault appear in current master controller, sovereignty just taken over by master controller for subsequent use becomes current master controller.
The present invention is by providing a kind of two-node cluster hot backup redundancy control system for container handpiece Water Chilling Units, be provided with master controller and master controller for subsequent use, by control method realizing master controller and master controller for subsequent use real-time data synchronization under normal circumstances, when master controller or master controller off-line for subsequent use or sensor fault, master controller and the no-harass switch of master controller for subsequent use when carrying out sovereignty handing-over is realized by certain control strategy, successfully ensure that the stable operation of whole system, while effectively reducing this hot backup redundancy system cost, high reliability and the no-harass switch of whole network system can also be ensured, to overcome high cost weak point of the prior art.
Should be understood that, application of the present invention is not limited to above-mentioned citing, for those of ordinary skills, can be improved according to the above description or convert, and all these improve and convert the protection domain that all should belong to claims of the present invention.
Claims (8)
1., for a two-node cluster hot backup redundancy control method for container handpiece Water Chilling Units, it is characterized in that, comprise the following steps:
Step S1: master controller and master controller for subsequent use calculate according to the value of water inlet manifold corresponding to its current master controller or outfall sewer temperature sensor the water pump number of units and compressor number of units that need open respectively;
Step S2: the important parameter of oneself is sent to the other side and the 3rd and the 4th controller by master controller and master controller for subsequent use in real time;
Step S3: the three controller and the 4th controller send the important parameter of oneself to master controller and master controller for subsequent use;
Step S4: judge whether master controller and master controller for subsequent use have off-line or respective sensor whether to have fault, if without continuation step S1; If have, perform step S5;
Step S5: if master controller off-line or sensor fault, current master controller is switched to master controller for subsequent use, before switching completes, the demand continuing to send by master controller before switching is to control online unit, and the demand sent according to master controller for subsequent use after having switched is to control online unit;
Wherein, if rehabilitation control system after master controller reparation, the information of other online units all transmits once to the master controller of this recurrence by the master controller for subsequent use then now serving as master control, the information of oneself is still sent to the master controller of this recurrence by other controllers by normal pattern, ownership is not changed to the master controller returned, until off-line or sensor fault appear in the master controller for subsequent use now serving as master control by the master controller for subsequent use now serving as master control.
2. the two-node cluster hot backup redundancy control method for container handpiece Water Chilling Units according to claim 1, is characterized in that, master controller and master controller for subsequent use are specified by control system, and both can exchange.
3. the two-node cluster hot backup redundancy control method for container handpiece Water Chilling Units according to claim 1, it is characterized in that, if master controller off-line for subsequent use or fault, then master controller, the 3rd controller and the 4th controller do not continue to send data message to master controller for subsequent use.
4. the two-node cluster hot backup redundancy control method for container handpiece Water Chilling Units according to claim 1, it is characterized in that, if rehabilitation control system after master controller reparation for subsequent use, the information of other online units all transmits once to the master controller for subsequent use of this recurrence by master controller, the master controller for subsequent use of this recurrence still keeps the identity of master controller for subsequent use to run in a network, and the information of oneself is still sent to the master controller for subsequent use of this recurrence by other controllers by normal pattern.
5. the two-node cluster hot backup redundancy control system for container handpiece Water Chilling Units, it is characterized in that, comprise four cooling by wind, four cover control system and annular communication networks, four cover control system comprise for unifying the master controller of cooperation control and master controller for subsequent use to the control system corresponding to four cooling by wind, and described master controller and master controller for subsequent use also need the controlling functions of holding a concurrent post the first cooling by wind and the second cooling by wind respectively; In four cover control system, the 3rd controller and the 4th controller serve as the 3rd cooling by wind and the 4th cooling by wind controlling functions respectively, described master controller, master controller for subsequent use, the 3rd controller and the 4th controller connect into loop network on network, the water inlet connected when master controller off-line or master controller or leaving water temperature sensors fault, then by the control of master controller adapter master controller for subsequent use.
6. the two-node cluster hot backup redundancy control system for container handpiece Water Chilling Units according to claim 5, is characterized in that, described master controller and master controller for subsequent use can exchange.
7. the two-node cluster hot backup redundancy control system for container handpiece Water Chilling Units according to claim 5, is characterized in that, described master controller and master controller for subsequent use are provided with inflow temperature sensor and leaving water temperature sensors respectively; On house steward's water inlet pipe that the water inlet of master controller and master controller for subsequent use and leaving water temperature sensors are installed in four cooling by wind and house steward's rising pipe.
8. the two-node cluster hot backup redundancy control system for container handpiece Water Chilling Units according to claim 5, is characterized in that, described master controller and master controller for subsequent use carry out real-time data synchronization under normal operating conditions.
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| CN105739469A (en) * | 2016-03-18 | 2016-07-06 | 天津惠普数据中心设计工程有限公司 | Data center machine room freeze water secondary pump redundancy control system and method |
| CN105611814B (en) * | 2016-03-22 | 2018-02-16 | 紫光华山科技服务有限公司 | A kind of refrigeration station of data center team control control system and control method |
| CN109946956B (en) * | 2019-03-27 | 2020-11-24 | 北京全路通信信号研究设计院集团有限公司 | Device main and standby system synchronization and hot standby method |
| CN113623924B (en) * | 2021-06-24 | 2023-01-10 | 杭州大和热磁电子有限公司 | Semiconductor refrigeration cold water machine with standby control system |
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Address after: 528313 Shunde City, Foshan province Chencun town machinery and equipment Park, No. ten, No. Road, No. 8 Patentee after: GUANGDONG SHENLING AIR-CONDITIONING EQUIPMENT CO., LTD. Address before: 528313 Shunde City, Foshan province Chencun town machinery and equipment Park, No. ten, No. Road, No. 8 Patentee before: Guangdong Shenling Air Conditioning Equipment Co., Ltd. |